Influence of supplemental UV-B radiation on photosynthetic characteristics of rice plants

被引：23

作者：

Ambasht, NK ^{[1
]}

Agrawal, M ^{[1
]}

机构：

[1] Banaras Hindu Univ, Dept Bot, Ecol Res Lab, Varanasi 221005, Uttar Pradesh, India

来源：

PHOTOSYNTHETICA | 1997年 / 34卷 / 03期

关键词：

biomass; carotenoids; catalase; chlorophyll; flavonoids; Oryza sativa; peroxidase; phenols; stomatal conductance; transpiration rate;

D O I：

10.1023/A:1006816202324

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

In a field experiment with rice (Oryza sativa L. cv. Saket 4) grown under ambient and supplemental ultraviolet-B (UV-B) radiation at 20 % ozone depletion, differences in gas exchange, concentrations of photosynthetic pigments, anthocyanins and flavonoids, biomass accumulation, catalase and peroxidase activities, and contents of ascorbic acid and phenol were determined. Decline in photosynthesis was associated with reductions in stomatal conductance and concentrations of photosynthetic pigments. Enhanced UV-B radiation (eUV-B) increased the contents of flavonoid and phenolic compounds in leaves. Peroxidase activity increased and catalase activity was always lower at eUV-B. The total plant biomass decreased at eUV-B.

引用

页码：401 / 408

页数：8

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